Flap closure



FIG. 1 is a front and left side perspective view of the flap closure showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a front elevational view;

FIG. 4 is a right side elevational view; and,

FIG. 5 is a bottom plan view.

The broken line showing of environment in the drawings is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a flap closure, as shown. 